Chapter 1 Biology Term Paper

Biology
1. If an interphase cell is treated with cyanide (a metabolic poison), the cell does not divide by mitosis. However, if cyanide is added right after mitosis has started, the same cell completes mitosis. Which of the following explains this observation? A. Metabolic activity ceases during mitosis B. Cell division does not require metabolic activity C. Energy required for mitosis is produced and stored in the cell during interphase D. Mitotic cells make factors that make them resistant to cyanide 2. The symplast pathway is most easily disrupted when A. Water transport channels in the plasma membrane of the root hair cells malfunction B. Water transport channels in the plasma membrane of the root cortex malfunction C. Water transport
Which of the following is a general nature of plant-pollinator interactions? A. Tight one to one co-evolutionary partnership B. A plant species is pollinated by a few pollinator species C. Plants rely on deceit to achieve pollination by pollinator species D. Most pollinators benefit the plant by providing pollinator services, but disadvantage the plant at the same time by laying eggs into the flower and thereby negatively affects fruit formation 14. Sickle cell anemia is a disease resulting from altered haemoglobin structure. This alteration is because of the replacement of a glutamic acid with valine. Indentify the protein structure level where this change has been made A. Primary B. Secondary C. Tertiary D. Quaternary 15. Which of the following life history adaptations is least likely when predation pressure, on a fish species that grows in size continuously throughout its lifespan, is concentrated on the larger individuals A. Allocate more resources preferentially to early reproduction than to growth B. Allocate more resources preferentially to growth than to early reproduction C. Sexual maturity at an early age D. Produce more offspring in very few reproductive
Formation of ammonia in Haber’s process, N2 + 3H2 → 2NH3 (∆H = −ve) can be increased by: A. increase in temperature and pressure. B. increase in temperature. C. increase in the concentration of ammonia. D. increase in pressure. 21. Choose the correct ordering for the dipole moments of the following molecules: A. CO2 ≤ BF3 < H2 O < H2 S. B. BF3 < CO2 < H2 S < H2 O. C. CO2 = BF3 < H2 S < H2 O. D. CO2 < BF3 < H2 S < H2 O. 22. Which among the following complexes of Mn given below has the spin only magnetic moment (µ s ) value of 5.9 BM? A. [Mn(CN)6 ]4− B. [Mn(Br)4 ]2− C. [Mn(en)3 ]2+ ; en = ethylenediamine D. Mn2 (CO)10 23. Schottky as well as Frenkel defects are observed in: 4

A. NaCl.

B. ZnS.

C. AgBr.

D. KCl.

24. A black mineral A on heating in air gives a gas B. The mineral A on reaction with H2 SO4 gives a gas C and a compound D. Bubbling C into an aqueous solution of B gives white turbidity. The aqueous solution of compound D, on exposure to air, with NH4 SCN gives a red compound E. The compounds A and E respectively, are: A. PbS and Pb(SCN)2 . B. NiS and Ni(SCN)2 . C. FeS and Fe(SCN)3 . D. CoS and Co(SCN)2 . 25. Using the diagram given below, the relation between k1 and k2 for the reaction A → C is:

A. k1 = k2 .

B.